From: Lennart Borgman <lennart.borgman.073@student.lu.se>
Cc: Emacs Devel <emacs-devel@gnu.org>
Subject: Re: Bug in looking-at?
Date: Sun, 14 Aug 2005 23:12:49 +0200 [thread overview]
Message-ID: <42FFB3D1.6050104@student.lu.se> (raw)
In-Reply-To: <42FE50AC.9030707@student.lu.se>
Lennart Borgman wrote:
> Lennart Borgman wrote:
>
>> Second time today I think I have found a bug... What should I say...
>> Hope this one is ok ;-)
>>
>> (defun bug-looking-at()
>> "Instructions for showing the possible bug:
>> 1. Place the point before \(interactive\) and run this function.
>> The first looking-at succeeds, the second fails.
>> 2. Then copy the last (looking-at ...), place point as before and run
>> with M-S-:.
>> It should fail to match again.
>> 3. Now recall this in M-S-: and add character s last in the regexp.
>> This time it should match. Try removing the s again..."
>> (interactive)
>> (unless (looking-at "(interactive)")
>> (error "Please put the point at \(interactive\)"))
>> (message "Second (looking-at ...) => %s" (looking-at
>> "(interactive)[[:space:]]+(unles")))
>>
>> I am doing this on w32, Emacs from 9 aug, emacs -Q.
>
>
> Some more information. Looking at the char syntax:
>
> (message "%s,%s,%s"
> (string (char-syntax ?\t))
> (string (char-syntax ?\r))
> (string (char-syntax ?\n)))
>
> gives " ,_,>" -- this is whitespace character, symbol constituent and
> comment ender.
>
> Could part of the problem here be that the syntax table is broken on
> w32 since ?\r is symbol constituent? But this can not be the whole
> story, since it behaves differently when run through -S-:
Richard has replied that he does not see this problem on his system
(GNU/Linux I suppose). I have the following to add:
- Setting the syntax for \r to either " " or ">" does not make
looking-at return t.
- If however [[:space:]] is replaced with [ \t\r\n] then looking-at
returns t.
To me there seems to be a couple of strange things going on. I have no
idea even where to start looking. Can someone else please test on at
least w32?
next prev parent reply other threads:[~2005-08-14 21:12 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-13 16:35 Bug in looking-at? Lennart Borgman
2005-08-13 19:57 ` Lennart Borgman
2005-08-14 21:12 ` Lennart Borgman [this message]
2005-08-14 21:50 ` Jason Rumney
2005-08-14 21:58 ` Jason Rumney
2005-08-14 22:39 ` Lennart Borgman
2005-08-15 23:42 ` Lennart Borgman
2005-08-14 17:21 ` Richard M. Stallman
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